Door-bolt-operating mechanism.



E. M. LETTS.

DOOR BOLT OPERATING MECHANISM.

APPLICATION FILED SEPT. 4. WM.

1,171,217. Patented Feb. 8,1916.

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ELLSWORTH M. LETTS, OF WAVERLY, NEW YORK.

DOOR-BOLT-OPEBATING MECHANISM.

Specification of Letters Patent.

Patented Feb. 8, 1916.

Application filed September 4, 1914. Serial No. 860,272.

To all whom it may concern:

Be it known that I, ELLswoin'n M. Ln'r'rs, a citizen of the United States, residing at Waverly, in the county of Tioga and State of New York. have invented certain new and useful Improvements in a Door-Bolt- Operating Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to mechanisms for operating a doorbolt by means of which the belt or bolts that restrain a door from opening swinging movement may be operated by a person endeavoring to pass through the door and moving into contact with a part of the operating mechanism; which mechanism is designed for eliminating accidents due to the congregating of people against the door in case of panic caused by fire or other similar occurrence.

Another object of this invention is the provision of a door bolt operating mechanism which embodies a body engageable bar which extends entirely across the width of the door and bears against a crank lever which is connected to a bolt operating means proper whereby the crank lever will be operated for sliding the door bolt when pressure is applied to the body engageable bar.

With the foregoing and other objects in view this invention consists in such novel features of construction, combination and arrangement of parts as will be hereinafter more fully described. illustrated in the accompanying drawing and claimed.

In describing the invention in detail. reference will be had to the accompanying drawings wherein like characters designate like or corresponding parts throughout the several views, and in which Figure 1 is a view in side elevation of the improved door bolt operating mechanism showing the same applied to a door bolt. Fig. 2 is a top plan of the improved door bolt operating mechanism. and Fig. 3 is an end view of the improved door bolt operating mechanism.

Referring more particularly to the drawings. 1 designates a door which is hingedly mounted on any suitable structure.

The door 1 has a plate 5 secured thereto in any suitable manner, which plate has brackets 6 and 7 secured to its outer face and spaced inwardly a short distance from the ends of the plate The brackets (S and T have openings 8 formed. therein in which openings are slidably seated a bar 10. The bar 10 has its rear end reduced in cross section and held against forward longitudinal movement within the openings 8 by a washer 11 which is mounted about the reduced end of the bolt and adjacent the outer surface of the bracket 6. The washer 11 is held in place on the bolt by a pin 12 which extends transversely through the reduced end of the bar. The forward end of the bar 10 has a pin 10' secured thereto and extending transversely therefronn which pin is seated in a slot 10 formed in a plate 10". The plate 10 is rotatably mounted upon a pin 10 which is secured to the plate 5 and extends transversely therefrom, as is clearly shown in Fig. '2 of the drawings. The plate 1O has bars or rods 10 and 10 secured thereto on opposite sides of the pivoted center of the plate, which rods are connected to vertically movable door bolts (not shown) so that when the plate 10 is rotated the bolts which are connected to the rods 10 and 10 will be moved out oi the keepers (not shown) with which they coact for preventing the opening movement of the door. The bolt 10 has a link or arm 14 securef thereto a short distance inwardly of the bracket 7, which link extends upwardly at an incline from the door bolt and is loosely connected to the vertical upstanding arm 15 of the crank arm 16. The crank arm 16 is rockably mounted in bearings 17 which are carried by the plate and is bent upwardly so that it will project outwardly from the ilate 5 after leaving the outermost bearing 1 The lever 15 has its terminal end 18 bent inwardly parallel to the portion 19 thereof, which is seated in the bearings 17, and the terminal end 18 is positioned for engagement with a body engageable rod or hand bar 20. The rod or hand bar 20 is rigidly secured to arms 21 and 22 which are pivotally supported by the brackets 6 and 7. The bar 20 extends substantially across the entire width of the door so that a person being pushed against the door will engage the rod or bar 20 and force the same downwardly or inwardly toward the plate 5. which inward movement will cause the bar 20 to rock the crank shaft 16 for moving the bar 10 longitudinally and rotating the plate 10 for operating door bolts which may be connected to the bars 10 and 10 The reduced end of the bar 10 has a spiral spring 15 coiled about the same which spiral spring abuts the shoulder formed by the reducing of the bolt and the inner surface of the bracket (3 wherel'iy when pressure is relieved from the bar 20, the bolt 10 will be automatically slid to a locking position and the bar 20 will be moved outwardly from the plate 5.

In the operation of the improved door bolt operating device: when a person engages the rod 20, by any portion of his body or hand and pushes against the same, the rod will be rocked upon the pivotal point of the arms 91 and 272 and forced inwardly toward the plate 5, which will force the angled end 18 of the rockable crank shaft 16 inwardly toward the plate 5, moving the end 18 away from the door casing and consequently sliding the bar 10 through the connection between the portion 15 and the bolt 10 by the link It. The moving of the bar 10 will cau e the pin 10 to rotate or rock the plate 10 which will move the rod 1O and 10 for sliding the door bolts (not shown). Immediately after the pressure has been removed from the. bar 20, the spiral spring 25 will force the bar 10 outwardly the turning bars 20 and the rockablc crank shaft 16 to their normal position.

It will be apparent that congestion at doors due to the inability to open the same in cases of fire or other excitable occur-- rences will be eliminated, owing to the fact that theater doors may be equipped with door bolts and the operating means heretofore described which will prevent the openingof the doors from the outside, but which will permit of the opening of the door by the mere pushing of one person against the door by another or by himself.

In reducing the invention to practice certain minor features of construction, combination and arrangement of parts may necessitate alteration to which the patentee is entitled provided such alterations are comprchendcd within the scope of what is claimed. 7

What is claimed is 1. In a door bolt operating mechanism,

4, of an attaching plate, a spring controlled bar slidably carried by said attaching plate, a link pivotally connected to said bar, a rockable crank shaft supported by said attaching plate, one end of said crank shaft being connected to said link, the opposite end of said crank shaft being bent upwardly and angled, a hand bar pivotallv connected to said attaching plate, the angled end of said crank shaft being positioned in the path of said hand bar for rocking said crank shaft and moving said slidable spring controlled bar upon movement of said hand bar toward said attaching plate, a disk rotatablv carried by said attaching plate, said slidable bar being cccentricallv connected to said disk for rotating the disk upon slidable movement of the bar, and means operatively connecting said disk to a door bolt.

2. In a door bolt operating mechanism, the combination, of an atta ching plate, a. bar slidably carried by said attaching plate, a disk rotatably carried by said attaching plate. said bar being eccentrically connected to said disk. a link pivotally connected to said bar. a crank shaft rockably supported by said attaching plate, one end of said crank shaft being connected to said link, a hand bar pivotally connected to said attaching plate, the end of said crank shaft remote from said link being bent upwardly and angled and positioned in the path of said hand bar for rocking the crank shaft upon movement of the hand bar toward said attaching plate. a spiral spring connected to said slidable bar for automatically returning said bar to its normal position and rocking said crank shaft for moving said pivoted hand bar outwardly after release of pressure therefrom, and means eccentrically connected to said disk for operating a door bolt upon rotation of the disk.

In testimony whereof I aflix my signature in presence of two witnesses.

ELLSIVORTH M. LET TS.

the combination.

lVitnesses ANDREW S. Conny, MAURICE C. Laws.

Copies f this patent may he obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

